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Search: authors:"Sayaka Kawabata"

2 papers found.
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A study of top-quark mass measurement using the lepton energy distribution at the Large Hadron Collider

We present a feasibility study of top-quark mass measurement using the lepton energy distribution in the top-quark decay \(t \rightarrow bW \rightarrow b\ell \nu \) at the LHC. The method used in this study requires only the lepton energy distribution at parton level. The analysis is performed in the lepton + jets final state by using fast simulation data corresponding to an...

Top-quark mass from the diphoton mass spectrum

We calculate the \(gg\rightarrow \gamma \gamma \) amplitude by including the \(t\bar{t}\) bound-state effects near their mass threshold. In terms of the non-relativistic expansion of the amplitude, the LO contribution is an energy-independent term in the one-loop amplitude. We include the NLO contribution described by the non-relativistic Green function and part of the NNLO...